Trousseau sign of latent tetany is a medical sign observed in patients with low calcium.

The Trousseau sign of latent tetany is also often used to detect early tetany.

It is also referred to as Trousseau syndrome and is distinct from the Trousseau sign of latent tetany.

Trousseau sign of latent tetany (eliciting carpal spasm by inflating the blood pressure cuff and maintaining the cuff pressure above systolic)

French Professor Armand Trousseau (1801-1867) devised the trick (now known as the Trousseau sign of latent tetany) of occluding the brachial artery by squeezing, to trigger cramps in the fingers.

His contributions to medicine include Trousseau sign of malignancy, Trousseau sign of latent tetany, Trousseau-Lallemand bodies (an archaic synonym for Bence Jones cylinders), and the truism, "use new drugs quickly, while they still work."